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Hi, Minimal standalone DS89C450 board with CH340 UART bridge and micro USB connector. Four LED's (blue power, yellow loader, green and red can be connected with jumpers to P0.1 and P0.2 pins) and reset button. On board is 16.384 MHz crystal (same as on DS89C450-KIT) that doubled make 33 MHz MCLK, and support 28800 bps UART. Price for board with DS89C450 chip and (EU) shipping with tracking is 25$ (paypal). demo.zip